EP 0209269 A2 19870121 - Emergency sign.
Title (en)
Emergency sign.
Title (de)
Notzeichen.
Title (fr)
Signe d'urgence.
Publication
Application
Priority
US 74981385 A 19850628
Abstract (en)
An illuminated sign (10) has a plurality of series connected light emitting diodes (22) arranged to form a perceivable intelligence and a control circuit (40) to supply power to the series connected diodes and maintain a battery (134) in a charged condition from line power and, during power failures, to supply power to the series connected diodes. The control circuit illuminates the diodes continuously during normal operation and a multivibrator (48) alternately switches the diodes on and off during a power failure.
IPC 1-7
IPC 8 full level
F21S 2/00 (2006.01); G08B 5/38 (2006.01); H02J 7/34 (2006.01); H05B 37/00 (2006.01); H05B 37/02 (2006.01); G08B 5/36 (2006.01)
CPC (source: EP)
G08B 7/062 (2013.01)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
EP 0209269 A2 19870121; EP 0209269 A3 19890111; CA 1250972 A 19890307; JP H07114151 B2 19951206; JP S6210899 A 19870119
DOCDB simple family (application)
EP 86304861 A 19860624; CA 499221 A 19860108; JP 15130286 A 19860627